Medium effects on pion production in heavy ion collisions
Medium effects on pion production in heavy ion collisions
Within the framework of the relativistic Vlasov-Uehling-Uhlenbeck transport model based on the relativistic nonlinear NL$\rho$ interaction, we study pion in-medium effects on the $\pi^-/\pi^+$ ratio in Au+Au collisions at the energy of $E/A=400~\mathrm{MeV}$. These effects include the isospin-dependent pion s-wave and p-wave potentials, which are taken from calculations based on …